In this video we find the concentration of hydrogen peroxide by titration using domestically available chemicals and equipment.
Hydrogen peroxide is titrated using potassium permanganate solution that was standardized with sodium oxalate. The titration is performed in a solution of sodium bisulfate to provide the acidic protons needed to run the reaction. Sodium oxalate is titrated with the potassium permanganate at 70 celsius until a linger pink or brown color is observed. The amount titrated is used to determine the actual concentration of the potassium permanganate.
Once the concentration is known, hydrogen peroxide is titrated with potassium permanganate until a lingering pink color is observed. Using the known concentration of permanganate the concentration of the hydrogen peroxide can be determined.
Related videos:
Making Sodium Oxalate: https://youtu.be/227KdtAK1yU
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https://www.youtube.com/watch?v=L940Ye4zRB0
This is a progress report on my current efforts into making sodium. This is not a standard how-to video.
Related videos:
Making sodium by the thermochemical dioxane process: https://www.youtube.com/watch?v=jCrFFVVcPUI
"Progress report: Theory test": https://www.youtube.com/watch?v=D4vDwQ4TyIc
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https://www.youtube.com/watch?v=oiZf-O6vvbE
We show how to purify aluminum nitrate and strontium nitrate by recrystallization. This is important because those two substances must be extremely pure for our upcoming video on making glow in the dark powder.
First make aluminum nitrate from our previous video: http://www.youtube.com/watch?v=u4Ha1SJrazY
Dissolve the dry aluminum nitrate in water and filter off any insoluble materials. We could not filter it off before it dried in the previous video because the particles at that stage are much too small. It needs crystallize once to aggregate into particles large that can be filtered.
After filtering, dry off the aluminum nitrate. The desiccator bag might be useful here: http://www.youtube.com/watch?v=XJFfS_YbbYI
After drying, carefully weigh out the crystals. Then take that mass and add in 20% mass of water. So if you have 50g like me, you add 10g of water (or 10mL since density is 1g/mL).
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https://www.youtube.com/watch?v=uVA0rK_VITY
We make a glow stick that changes colour with time.
To do so, we prepare our standard chemiluminescent mixture:
10mL Diethyl Phthalate
3mg of 9,10-bis(phenylethynl)anthracene
5mg Rhodamine B
50mg TCPO
100mg sodium acetate
3mL 30% hydrogen peroxide (add last to start reaction)
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https://www.youtube.com/watch?v=2__CQ29BHKY
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Use the discount code "copper" for a 5% discount.
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Make Iron Oxide: https://www.youtube.com/watch?v=8ZQ67POLiqg
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https://www.youtube.com/watch?v=RiF73l4PjyY
In this video we Efficiently Recover Nitric Acid and Copper Metal From Copper Nitrate Wastes by reacting copper nitrate wastes with sulfuric acid to generate nitric acid and copper sulfate. Then we electrolyze the copper sulfate to recovery copper metal and sulfuric acid.
Donate to NurdRage!
Through Patreon (preferred): https://www.patreon.com/NurdRage
Through Youtube Memberships: https://www.youtube.com/channel/UCIgKGGJkt1MrNmhq3vRibYA/join
Through Bitcoin: 1NurdRAge7PNR4ULrbrpcYvc9RC4LDp9pS
Glassware generously provided by http://www.alchemylabsupply.com/
Use the discount code "nurdrage" for a 5% discount.
Twitter: https://twitter.com/NurdRage
Reddit: https://www.reddit.com/r/NurdRage/
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https://www.youtube.com/watch?v=l8uQWibpRYk
We show why gallium cannot be used as a thermal interface material for aluminum heat sinks.
LINK REMOVED - I am not affiliated with the supplier at this time. Cheaper sources of gallium can be found on ebay and amazon.com
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https://www.youtube.com/watch?v=JHHI2Lk79cY
In this video we dissolve a Platinum Bar in a combination of hydrochloric and nitric acids better known as aqua regia.
First the 1 ounce platinum bar is covered with 200mL of 12M hydrochloric acid (about 37%). Then 25mL of 15M nitric acid (~70%) is added. The mixture is gently heated to near boiling. The acid will bubble as it reacts. Chemical gas bubbling like this looks more like fizzing and is distinct from boiling. When the bubbling almost stops (~4 hours) add another 25mL of nitric acid. Repeat as necessary. The dissolution is very slow and may take days for a compact bar of platinum. This reaction is usually much quicker for small bits of platinum scrap or powder. If more then 75mL of nitric acid has been added then alternate subsequent acid additions with 50mL hydrochloric acid and 25mL nitric acid. This is because both hydrochloric and nitric acids are consumed in side reactions.
Eventually the platinum will dissolve into a red liquid while hot and when cooled will be an orange liquid. This crude solution of chloroplatinic acid and unreacted nitric and hydrochloric acids may be further processed into purified chloroplatinic acid.
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https://www.youtube.com/watch?v=APxL87X92t4
In this video we make fake chemical blood using the classical reaction of ferric chloride and potassium thiocyanate.
Get half a gram of ferric chloride and half a gram of potassium thiocyanate. Add about 10 mL of water to both and shake them up until they are both fully dissolved.
Now get some of the clear potassium thiocyanate solution and rub it across one hand.
With the ferric chloride solution soak in it a fake weapon like a pair of scissors. Once it's wet draw it across the hand that was soaked in potassium thiocyanate. You'll get a dark red compound that looks like blood. It's a great way to scare people that you've cut yourself. What's happening is the thiocyanate is reacting with the iron to form iron thiocyanate that has a deep red color.
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https://www.youtube.com/watch?v=ZgbY7WzkplI